SIGSEGV when calling `glab mr issues`
### Checklist
<!-- Please test the latest versions, that will remove the possibility that you see a bug that is fixed in a newer version. -->
- [x] I'm using the latest version of the extension (Run `glab --version`)
- Extension version: _Put your extension version here_
- [x] Operating system and version: MacOS 26.3.1
- [x] Gitlab.com or self-managed instance? gitlab.com
- [ ] GitLab version (if self-managed) _GitLab version here_
(Use the `version` endpoint, like this: gitlab.my-company.com/api/v4/version)
- [x] I have performed `glab auth status` to check for authentication issues
- [x] Run the command in debug mode (like `DEBUG=true glab mr list`) and attach any useful output
```
$ DEBUG=true glab mr issues 212
[git remote -v]
[git config --get-regexp ^remote\..*\.glab-resolved(-base|-head)?$]
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x0 pc=0x1058eb638]
goroutine 1 [running]:
gitlab.com/gitlab-org/cli/internal/commands/issue/issueutils.DisplayIssueList(0x509500d62790, {0x509500c04028, 0x1, 0xd4?}, {0x5095010cc000?, 0x0?})
gitlab.com/gitlab-org/cli/internal/commands/issue/issueutils/utils.go:41 +0x658
gitlab.com/gitlab-org/cli/internal/commands/mr/issues.NewCmdIssues.func1(0x50950129e008, {0x5095011089a0, 0x1, 0x1})
gitlab.com/gitlab-org/cli/internal/commands/mr/issues/mr_issues.go:61 +0x220
github.com/spf13/cobra.(*Command).execute(0x50950129e008, {0x509501108910, 0x1, 0x1})
github.com/spf13/cobra@v1.10.2/command.go:1015 +0x814
github.com/spf13/cobra.(*Command).ExecuteC(0x509501276008)
github.com/spf13/cobra@v1.10.2/command.go:1148 +0x350
github.com/spf13/cobra.(*Command).Execute(...)
github.com/spf13/cobra@v1.10.2/command.go:1071
github.com/spf13/cobra.(*Command).ExecuteContext(...)
github.com/spf13/cobra@v1.10.2/command.go:1064
charm.land/fang/v2.Execute({0x1078d0de0, 0x107bd2300}, 0x509501276008, {0x50950147feb0, 0x5, 0x7?})
charm.land/fang/v2@v2.0.1/fang.go:173 +0x2e0
main.main()
gitlab.com/gitlab-org/cli/cmd/glab/main.go:180 +0x848
```
### Summary
call to `glab mr issues` or `glab mr issues <id | branch>` errors
### Environment
- OS: Darwin 25.3.0 arm64
- SHELL: /bin/zsh
- TERM: xterm-256color
- GLAB: glab 1.90.0 (19936043)
Other:
### Steps to reproduce
Run `glab mr issues` in terminal. Other mr subcommands work though.
### What is the current _bug_ behavior?
It crashes
### What is the expected _correct_ behavior?
It shouldn't crash
### Relevant logs and/or screenshots
issue